在一段时间间隔后，将当前视图控制器Dissmiss返回到MainView控制器IOS 7

您好，在我的应用程序中，我正在将图像从我的设备上传到服务器，一切正常，但现在我遇到了一些问题。上传图像后，必须自动返回主视图控制器。它不起作用，请告诉我怎么做

上传编码

    NSString *urlString = @"url";

    NSMutableURLRequest *request = [[[NSMutableURLRequest alloc]init]autorelease];
    [request setURL:[NSURL URLWithString:urlString]] ;
    [request setHTTPMethod:@"POST"];

    NSString *boundary = @"---------------------------14737809831466499882746641449";
    NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@",boundary];
    [request addValue:contentType forHTTPHeaderField:@"Content-Type"];

    NSMutableData *body = [NSMutableData data];
    [body appendData:[[NSString stringWithFormat:@"\r\n--%@\r\n",boundary]dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[@"Content-Disposition: form-data; name=\"userfile\"; filename=\".jpg\"\r\n"dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[@"Content-Type: application/octet-stream\r\n\r\n"dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[NSData dataWithData:imageData]];
    [body appendData:[[NSString stringWithFormat:@"\r\n--%@--\r\n", boundary]dataUsingEncoding:NSUTF8StringEncoding]];
    [request setHTTPBody:body];

    NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
    NSString *returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];

    NSLog(@"%@data",returnString);


    **[self performSelector:@selector(dissMissViewController) withObject:self afterDelay:2.0f];**  

取消编码

     - (void)dissMissViewController
  {
   [self.navigationController popViewControllerAnimated:YES];
   [self dismissViewControllerAnimated:YES completion:nil];
  }

上传后，我想回到我的主视图控制器，请告诉我这是正确的方法。是否有其他方法可以做到这一点

---

谢谢。

首先，您必须知道图像上载是否成功，在成功时，您需要关闭并弹出到主viewcontroller，如下所示：-

-(void)dissMissViewController
  {
    [self dismissViewControllerAnimated:YES completion:^{
    [self.navigationController popViewControllerAnimated:YES];}];
  }

您还可以弹出特定的视图控制器，如：-

for (UIViewController *controller in [self.navigationController viewControllers])
{
    if ([controller isKindOfClass:[yourviewcontroller class]])
    {
        [self.navigationController popToViewController:controller animated:YES];
        break;
    }
}

[self.navigationController popToRootViewControllerAnimated:YES]

您还可以使用下面这行代码弹出一个rootviewcontroller:-

for (UIViewController *controller in [self.navigationController viewControllers])
{
    if ([controller isKindOfClass:[yourviewcontroller class]])
    {
        [self.navigationController popToViewController:controller animated:YES];
        break;
    }
}

[self.navigationController popToRootViewControllerAnimated:YES]

---

注意：在DismissViewcontroller的完成块中使用此pop代码

首先您应该使用异步方法，因为当前您正在主线程中执行此操作

使用连接的委托方法将数据发送到服务器， 并使用连接的委托方法

connectiondFinishLoading

获取已成功上载图像的通知

或者试试这个

- (void)connectionDidFinishLoading:(NSURLConnection *)connection{

[self dismissViewControllerAnimated:YES completion:^{
    [self.navigationController popViewControllerAnimated:YES];}];

}

---

请告诉我如何回到我的主要观点controller@Nintin我在我的dismissview控制器中使用了[self.navigationController popToRootViewControllerAnimated:YES]它不工作我不知道y@Nitin您正在使用故事板吗？请尝试

popToRootViewController

方法